Seven CEO's ex-lover takes to Twitter

Amber Harrison, the former Seven West Media employee who had an affair with CEO Tim Worner, has released letters from her ex-lover on Twitter as her battle with the network continues.

In one note, on CEO's letterhead to Ms Harrison, Mr Worner thanks her for making "increasingly frequent trips to Crown more enjoyable".

"It's like I really am somebody all of a sudden. Quite a weird feeling. But I could get used to it," Mr Worner says in the February 14, 2013, typed letter, on which "Amber" and his signature are handwritten in blue pen.

In a tweet accompanying the photo of the letter, Ms Harrison said it related to a "hotel stay" during the Australian Open tennis tournament in January, 2013.

In another letter, dated August 5, 2013, and also on the CEO's letterhead, Mr Worner writes: "I have to say the organisation of that conference was extraordinary. The creativity and flair that you brought to the proceedings made for a first class experience."

Ms Harrison tweeted: "SWM Board alternative fact: it was private matter. Fact: Letters sent by CEO. On company letterhead."

The letters are among a number posted on the account in recent days.

Ms Harrison says in her Twitter profile that she has joined the social network "to chat to Jeff Kennett" - the former Victorian premier and now Seven West board member and chairman of depression support group beyondblue.

Seven West released results of an independent report last week, clearing Mr Worner of misconduct allegations made by Ms Harrison, including misuse of corporate credit cards and illicit drug use, during the affair.

Seven said the investigation found Ms Harrison's claims could not be substantiated and described communications between her and Mr Worner as "personal and private in nature".

The affair, which began in 2012 and ended in July, 2014, became public knowledge in December last year, when Ms Harrison contacted media outlets with details of the relationship and allegations she had been treated vindictively by the company.

Ms Harrison, who was 35 when the affair began, said she became distressed by the workplace relationship and sought unsuccessfully to end it.

She alleged she was subsequently confronted with accusations of abusing her corporate credit card and her employment reportedly ended in 2014.

Seven made a confidential agreement with Ms Harrison at the time of her departure, with the deed including payments in recognition of her "fragile emotional stability" and to "enable her to move on with her life".